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Diffstat (limited to 'src/main/jni/libyuv/source/mjpeg_validate.cc')
-rw-r--r-- | src/main/jni/libyuv/source/mjpeg_validate.cc | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/main/jni/libyuv/source/mjpeg_validate.cc b/src/main/jni/libyuv/source/mjpeg_validate.cc new file mode 100644 index 000000000..23d22d099 --- /dev/null +++ b/src/main/jni/libyuv/source/mjpeg_validate.cc @@ -0,0 +1,47 @@ +/* + * Copyright 2012 The LibYuv Project Authors. All rights reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "libyuv/mjpeg_decoder.h" + +#ifdef __cplusplus +namespace libyuv { +extern "C" { +#endif + +// Helper function to validate the jpeg appears intact. +// TODO(fbarchard): Optimize case where SOI is found but EOI is not. +LIBYUV_BOOL ValidateJpeg(const uint8* sample, size_t sample_size) { + size_t i; + if (sample_size < 64) { + // ERROR: Invalid jpeg size: sample_size + return LIBYUV_FALSE; + } + if (sample[0] != 0xff || sample[1] != 0xd8) { // Start Of Image + // ERROR: Invalid jpeg initial start code + return LIBYUV_FALSE; + } + for (i = sample_size - 2; i > 1;) { + if (sample[i] != 0xd9) { + if (sample[i] == 0xff && sample[i + 1] == 0xd9) { // End Of Image + return LIBYUV_TRUE; // Success: Valid jpeg. + } + --i; + } + --i; + } + // ERROR: Invalid jpeg end code not found. Size sample_size + return LIBYUV_FALSE; +} + +#ifdef __cplusplus +} // extern "C" +} // namespace libyuv +#endif + |